Note that spaces must be escaped in the URL as %20 (standard URL escape code for space).

Constraints on the Allowed Values in Search Queries and Sorts

Note the following constraints on the allowed values in the queries and sorts, based on database performance requirements:

Sorts can support only a single column.

Sorts can specify only a column that is indexed.

Queries can support only an indexed column or a boolean column.

Queries can specify more than one column only if all columns belong to a single compound index. (Note: the ability to specify more than one column is not yet implemented; at this time, only single criteria queries are allowed.)

When both a query and a sort are specified, the sort column must be one of the columns in the query.